<!DOCTYPE html>
<html class=test-wait>
  <title>CSS Anchor Positioning: Don't crash when animating position and position-try-fallbacks in grid</title>
  <link rel="help" href="https://crbug.com/339686368">
  <style>
    @keyframes --anim {
      from {
        position: absolute;
        position-try-fallbacks: flip-block;
      }
    }
    #parent {
      display: inline-grid;
    }
    #victim {
      height:100em;
    }
    #victim.anim {
      animation: --anim 100ms linear;
    }
  </style>
  <p>PASS if no crash</p>
  <div id=parent>
    <div id=victim></div>
  </div>
  <script>
    victim.classList.add('anim');
    victim.addEventListener('animationend', () => {
      victim.offsetTop;
      document.documentElement.classList.remove('test-wait');
    });
  </script>
</html>